I asked him why he thinks the black UCC would explode and he said the only way for them to explode is if they were wired with reverse polarity.Or if they were wired with shorted rectifier diodes.
Cary V-12 blowing capacitors
Hi,
I have a pair of Cary V12 monoblocks one of which is blowing capacitors. It was initially sent in to cary as it was the 3 Amp fuses. They initially replace the capacitors and sent it back. It worked briefly and then started blowing fuses again. It went back to Carrie and this time they replaced both transformers. It did work for a couple of weeks but yesterday when I turn it on and was in the standby mode I heard a crackling noise from inside the amp and 3 amp fuse blew again. There was a large puddle of oil in the back of the amp which is from the capacitor. So it seems like something is still not repaired correctly which is causing the capacitors to blow which maybe is why the fuses are blowing. With it being to cary twice and they are not really sure what's happening has anyone else had this issue?
I have a pair of Cary V12 monoblocks one of which is blowing capacitors. It was initially sent in to cary as it was the 3 Amp fuses. They initially replace the capacitors and sent it back. It worked briefly and then started blowing fuses again. It went back to Carrie and this time they replaced both transformers. It did work for a couple of weeks but yesterday when I turn it on and was in the standby mode I heard a crackling noise from inside the amp and 3 amp fuse blew again. There was a large puddle of oil in the back of the amp which is from the capacitor. So it seems like something is still not repaired correctly which is causing the capacitors to blow which maybe is why the fuses are blowing. With it being to cary twice and they are not really sure what's happening has anyone else had this issue?
Showing 3 responses by imhififan
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The original power transformer that was in it had a direct short and could have caused the UCC’s to stress.I thought the opposite, shorted filtering caps stress upstream power supply components ( rectifier diodes, power transformer and fuse ) to fail. My guess is the 20+ years old leaking/shorted power supply filtering caps stressed and weaken the power transformer and rectifier diodes. Cary only replaces the power supply filtering caps for the first repair, but the already weakened power transformer caused failure and Cary replaces the transformer for the second repair. This time perhaps the bad rectifier diodes caused the filtering caps fail again. |